NETGEAR ProSafe SRX5308 Reference Manual page 179

ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308
Table 43. Add Mode Config Record screen settings (continued)
Settings
DNS Server
Traffic Tunnel Security Level
Note: Generally, the default settings work well for a Mode Config configuration.
PFS Key Group
SA Lifetime
Encryption Algorithm From the drop-down list, select one of the following five algorithms to negotiate the
Integrity Algorithm
Local IP Address
Local Subnet Mask
4. Click Apply to save your settings. The new Mode Config record is added to the List of Mode
Config Records table.
Continue the Mode Config configuration procedure by configuring an IKE policy.
5. Select VPN > IPSec VPN. The IPSec VPN submenu tabs display, with the IKE Policies
screen in view (see
6. Under the List of IKE Policies table, click the Add table button. The Add IKE Policy screen
displays:
Virtual Private Networking Using IPSec Connections
Description
Enter the IP address of the DNS server that is used by remote VPN clients in the
Primary field. You can enter the IP address of a second DNS server in the
Secondary field.
Select this check box to enable Perfect Forward Secrecy (PFS), and then select a
Diffie-Hellman (DH) group from the drop-down list. The DH Group sets the strength
of the algorithm in bits. The higher the group, the more secure the exchange. From
the drop-down list, select one of the following three strengths:
• Group 1 (768 bit)
• Group 2 (1024 bit). This is the default setting.
• Group 5 (1536 bit)
The lifetime of the security association (SA) is the period or the amount of
transmitted data after which the SA becomes invalid and needs to be renegotiated.
From the drop-down list, select how the SA lifetime is specified:
• Seconds. In the SA Lifetime field, enter a period in seconds. The minimum value
is 300 seconds. The default value is 3600 seconds.
• KBytes. In the SA Lifetime field, enter a number of kilobytes. The minimum value
is 1920000 KB.
security association (SA):
• DES. Data Encryption Standard (DES).
• 3DES. Triple DES. This is the default algorithm.
• AES-128. Advanced Encryption Standard (AES) with a 128-bits key size.
• AES-192. AES with a 192-bits key size.
• AES-256. AES with a 256-bits key size.
From the drop-down list, select one of the following two algorithms to be used in the
VPN header for the authentication process:
• SHA-1. Hash algorithm that produces a 160-bit digest. This is the default setting.
• MD5. Hash algorithm that produces a 128-bit digest.
The local IP address to which remote VPN clients have access. If you do not specify
a local IP address, the VPN firewall's default LAN IP address is used (by default,
192.168.1.1).
The local subnet mask. Typically, this is 255.255.255.0.
Figure 104 on page 160).
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